Adjustable stop member for gaging-blocks



J. onsow.

ADJUSTABLE STOP MEMBER FOR GAGING BLOCKS.

APPLICATION FILED OCT. 1. 1919.

1,376,409. I Patented May 3,1921Q INVENTOR BY M UNITED STATES PATENT OFFICE.

JESSE DITSON, OF LITTLETON, COLORADO, ASSIGNOR, BY MESNE ASSIGNMENTS, TO INGERSOLL-BAND COMPANY, A CORPORATION OF NEW JERSEY.

ADJUSTABLE STOP MEMBER FOR GAGING-BLOCKS.

Specification of Letters Patent.

Patented May 3, 1921.

Application filed October 1, 1919. Serial No. 327,690.

ful Improvement in Adjustable Stop Mom-- bers for Gaging-Blocks, of wliich'the following is a specification.

This invention relates to a forming and gaging device for forming and gaging drill steels commonly used for drilling rock, and relates especially to a device for rapidly and adjustably positioning the drill steel relative to a pair of gaging blocks so that it will be brought down to the proper gage or diameter and properly formed on its lateral edges when being sharpened.

The objects of the present invention are to provide an adjustable stopmember adaptcd to be associated with a pair of gaging blocks which may be readily adjusted to different positions to vary the gage or outer diameter of the drill steels being sharpened.

A further object of the invention is to provide a slidable adjustable stop member with a catch member which will definitely locate the stop member so that the drill may be accurately positioned relatively to the gaging blocks so that it may be accurately gaged.

Further objects of the invention are to provide means for readily varying the position of the stop member and to provide means adapted for gaging a wide ran e of sizes of the drill bits and that will permit the r adjustment of the stop member to be accomplished readily and easily.

lVith these and other objects in view my invention consists in the features of construction and operation set forth in the fol lowing specification.

In the drawings annexed hereto and forming a part of this specification:

Figure 1 refers to the upper half of the gaging block.

Fig. 2 shows the lower half of the gaging block with the adjustable stop member in position for use, and

Fig. 3 is a longitudinal sectional elevation of Fig. 2 on the line 33 looking in the direction of the arrows, showing a drill steel resting in the larger concavity.

Referring more particularly to the figures of the drawing, 1 refers to the lower half of the gaging block, 2 to the corresponding upper half of the gaging block opposite to and disposed vertically above the lower half of the gaging block 1. Preferably the gaging block halves 1 and 2 are each provided with a plurality of concaved portions shown clearly at 3 and 4 in the lower half 1. One of these concaved portions is of a shorter radius and disposed at a position relatively higher than the other concaved depression 4. The upper half of the gaging block 2 is similar to block 1 and is provided with depressions shown at 5 and 6 opposite to and of the same dimensions as the corresponding concaved depressions 3 and 4 in the lower gaging block half 1.

Provision of these two different gaging depressions permits drill bits to be gaged properly within a considerably greater range of diameters than if but one concaved portion was provided. The depressions 3 and 5 would be used for gaging drill bits of smaller diameters and the depressions 4 and 6 use for gaging drill bits of larger diameter. Each of the depressions 3456 slope gradually from front to rear of the gaging blocks. In this way the entire range of drill bits in ordinary use may be properly gaged in a single device, thus obviating the necessity of changing the gaging blocks when different size drill bits are to be sharpened and gaged. It is to be understood that the relative movement of the two halves of the gaging blocks is always the same, that is, the upper half 2 is brought down to within the same distance of the lower half 1 at each stroke of the sharpening machine.

Along the lateral sides of the lower gaging block half 1 are guide ways 7 lying parallel to the bottom surface of this block, and sliding in this groove or guide way is the adjustable stop member shown generally at 8 which is the particular part of the present construction sought to be claimed.

The adjustable stop 8 is formed in the shape of a yoke member sliding easily forwardly and backwardly in the lower gaging block 1 by means of projections fitting in the grooves 7. At the rearward end of the adjustable stop is provided a cross piece 9, having positioning portions 10 directly over the depressions 3 and 4 respectively. These positioning devices 10 comprise a V-shapeds ot m mb r 11 into wh ch the end of the drill steel to be sharpened may At the opposite end of the a justable stop member 8 mounted between ears A and A depending therefrom is a latch member 12 adapted to engage depressions 13, provided readily positioned to any other position within the range of the gaging block.

The rod 14 may be conveniently provided with suitable numerals 16 to show exactly the size bit which will be gaged when the stop member is placed in that particular depression. Obviously with the two gaging depressions 3 and 4, two sets of numerals will be required which ma be conveniently placed on opposite sides 0 the rod 14.

Referring now to the operation of the device, the lower gaging block 1 is securely mounted in a stationary part of the dril sharpening machine and the upper gaging block2 securely mounted in the upper movable member of the drill sharpening machine (not shown) directly over and in alinement with the lower gaging member 1. This adjustable stop member is posltioned by adjusting it forwardly or rearwardly so that the latch 12 engages the notch corresponding to the gage desired. With the members in this. position the drill steel may be positioned in the positioning device 10, having one of its points or edges inserted in the V-shaped slot 11, and the upper gaging block half 2 brought down upon the drill bit by operation of the sharpening machine, whic drill bit to the proper gage.

The adjusting stop member is primarily designed for forming and gaging the cross bit and alsothe Carr bit, both of which forms of bits are in extensive use but the present invention may readily be used for any of the usual t pes of drill bit.

t is to be un erstood that the present showing and description disclose only one specific embodiment of my resent invent1on and that other forms an modifications are included within the spirit and scope thereof, as expressed in the appended claims.

be inserted.

will thus forge down the sides of the What I claim is:

1. An adjustable stop member for gaging blocks for drill bits, comprising a stationary and a relatively movable block, a yoke having slidable engagement with the stat onary block and provided with a bit posltiomng portion at the end engaging the block, aguidin rod fixed relatively to the statlonary bloc extending through the outer end of the yoke, and locking means between the rod and the yoke for maintainmg the yoke in the desired location.

2. An adjustable stop member for gaging blocks for drill bits, comprising astationaryand a relatively movable block, a yoke having slidable engagement with the stat onary block. and provided with a bit positioning portion at the end engaging the block, a iding rod extending through the outer en of the yoke, a scale on the rod indicating the size to which the bit will be gaged when the yoke is in a given location an locklng means between the guiding rod and the yoke to maintain the yoke in the desired location.

3. An adjustable stop member for gaging blocks for drill bits, comprising a stationary and a relatively movable block, said block having a plurality of concaved portlons, a yoke having slidable engagement with the stationary block and provided with "a bit positioning portion at the end engaging the block, a guiding rod connected to the lower block and extending through the outer end of the yoke, a scale on the rod indicating the size to which the bit will be gaged when the yoke is in a given location and locking means at the outer end of the yoke engaglng said rod to maintain the yoke in the desired location.

4. An adjustable stop member for gaging blocks for drill bits, comprising a stationary and a relativelymovable member, a yoke having slidable engagement with the stationary member and provided with a bit receiving portion at one end, a guiding rod fixed relatively to the stationary member, extending through said yoke at the opposite end and locking means for maintaining the yoke in the desired location.

In testimony whereof, I have hereunto set my hand.

JESSE DITSON. 

